This application provides a communication method and apparatus, so that a terminal device sends uplink pilot signals, the terminal device obtains a first delay information set based on downlink pilot signals from a network device, and the network device jointly considers the first delay information set and the uplink pilot signals to perform uplink channel estimation. The first delay information set may indicate a delay position of a strong path, and uplink channel estimation accuracy can be improved.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The method according to claim 1, wherein the first delay information set is carried by using downlink channel state information.
4. The method according to claim 3, wherein delay positions of the Np paths in the pth piece of first delay information is a subset of the delay positions of the T paths, Np≤T, and wherein the pth piece of first delay information indicates indexes of the delay positions of the Np paths in the delay positions of the T paths.
5. The method according to claim 1, wherein the terminal device receives first information from the network device, wherein the first information indicates frequency domain positions of the downlink pilot signals, and wherein the frequency domain positions of the downlink pilot signals are distributed at unequal intervals.
6. The method according to claim 3, wherein the terminal device determines frequency domain positions of the downlink pilot signals based on the second delay information.
8. The method according to claim 7, wherein the second information further indicates the terminal device to receive second delay information.
10. The method according to claim 9, wherein the first delay information set is carried by using downlink channel state information.
12. The method according to claim 11, wherein delay positions of the Np paths in the pth piece of first delay information is a subset of the delay positions of the T paths, Np≤T, and wherein the pth piece of first delay information indicates indexes of the delay positions of the Np paths in the delay positions of the T paths.
13. The method according to claim 9, wherein the network device sends first information to the terminal device, wherein the first information indicates frequency domain positions of the downlink pilot signals, and wherein the frequency domain positions of the downlink pilot signals are distributed at unequal intervals.
15. The method according to claim 14, wherein the second information further indicates the terminal device to receive second delay information.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
March 29, 2023
December 24, 2024
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